Fentanyl vs Metoprolol

## Fentanyl vs Metoprolol: Overview

This comparison examines the pharmacological differences between **Fentanyl** and **Metoprolol**.

## Mechanism of Action

**Fentanyl**: Highly potent synthetic mu-opioid receptor agonist approximately 100 times more potent than morphine.

**Metoprolol**: Selective beta-1 adrenergic receptor blocker.

## Pharmacokinetics

**Half-life**: Fentanyl — 2-4 hours; Metoprolol — 3-7 hours.

## Chemical Properties

**Molecular Formula**: Fentanyl — C22H28N2O; Metoprolol — C15H25NO3.

**Molecular Weight**: Fentanyl — 336.4700 g/mol; Metoprolol — 267.3640 g/mol.

**Type**: Fentanyl — Small molecule; Metoprolol — Small molecule.